From: Jeff Garzik <jgarzik@pobox.com>
To: "Luciano A. Stertz" <luciano@tteng.com.br>
Cc: linux-ide@vger.kernel.org
Subject: Re: T10/04-262 ATA pass thru - patch.
Date: Wed, 29 Sep 2004 14:32:27 -0400 [thread overview]
Message-ID: <415AFFBB.8090503@pobox.com> (raw)
In-Reply-To: <415AFF27.7080906@tteng.com.br>
Luciano A. Stertz wrote:
>
> Just trying to understand the SATA SMART problem as a whole. With
> your patch, it's possible to send ATA commands that are encapsulated in
> CDBs, right? If so, to enable sending direct ATA commands to a SATA
> device, one has to create a ioctl that receives the command and creates
> a CDB from it, as John Linville did a few weeks ago. This way a
> user-space application (e.g. smartmontools) can use this ioctl to send
> ATA commands. Am I right?
No. SCSI "send CDB" ioctls have existed for years.
The ioctls John added are merely for compatibility with existing IDE
utilities.
> If I understand it correctly, the kernel receives an ATA command,
> creates a CDB, gets the ATA command from the CDB and issues it.
> It's a nice workaround, but user space software will still have to
> be aware that the target device appears as SCSI but isn't in fact a SCSI
> device... I guess that the ideal situation would be:
The SAT INQUIRY draft follows the standard that I (libata) set: the
vendor id is "ATA".
Jeff
next prev parent reply other threads:[~2004-09-29 18:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-28 5:16 T10/04-262 ATA pass thru - patch Andy Warner
2004-09-28 5:39 ` Andy Warner
2004-09-29 16:49 ` John W. Linville
2004-09-29 18:19 ` Andy Warner
2004-09-29 17:12 ` John W. Linville
2004-09-29 20:44 ` Andy Warner
2004-09-29 18:29 ` Luciano A. Stertz
2004-09-29 17:20 ` John W. Linville
2004-09-29 18:32 ` Jeff Garzik [this message]
2004-09-29 19:31 ` Luciano A. Stertz
2004-09-29 19:38 ` Luciano A. Stertz
2004-09-29 18:55 ` John W. Linville
2004-10-05 18:53 ` Luciano A. Stertz
2004-10-05 19:06 ` Andy Warner
2004-10-05 22:19 ` Jeff Garzik
2004-10-05 22:37 ` Andy Warner
2004-10-05 22:41 ` Jeff Garzik
2004-10-06 6:04 ` Jens Axboe
2004-10-07 3:34 ` Jeff Garzik
2004-10-06 12:21 ` Luciano A. Stertz
2004-09-30 18:13 ` [patch libata-2.6] libata: SMART support via ATA pass-thru John W. Linville
2004-09-30 19:52 ` Jeff Garzik
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